Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 1 | /* |
| 2 | * SuperH EHCI host controller driver |
| 3 | * |
| 4 | * Copyright (C) 2010 Paul Mundt |
| 5 | * |
| 6 | * Based on ohci-sh.c and ehci-atmel.c. |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License. See the file "COPYING" in the main directory of this archive |
| 10 | * for more details. |
| 11 | */ |
| 12 | #include <linux/platform_device.h> |
| 13 | #include <linux/clk.h> |
Nobuhiro Iwamatsu | 3e0c70d | 2012-04-12 15:48:49 +0900 | [diff] [blame] | 14 | #include <linux/platform_data/ehci-sh.h> |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 15 | |
| 16 | struct ehci_sh_priv { |
| 17 | struct clk *iclk, *fclk; |
| 18 | struct usb_hcd *hcd; |
| 19 | }; |
| 20 | |
| 21 | static int ehci_sh_reset(struct usb_hcd *hcd) |
| 22 | { |
| 23 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 24 | |
| 25 | ehci->caps = hcd->regs; |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 26 | |
Alan Stern | c73cee7 | 2012-10-31 13:21:06 -0400 | [diff] [blame] | 27 | return ehci_setup(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 28 | } |
| 29 | |
| 30 | static const struct hc_driver ehci_sh_hc_driver = { |
| 31 | .description = hcd_name, |
| 32 | .product_desc = "SuperH EHCI", |
| 33 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 34 | |
| 35 | /* |
| 36 | * generic hardware linkage |
| 37 | */ |
| 38 | .irq = ehci_irq, |
Greg Kroah-Hartman | c04ee4b | 2013-09-23 13:32:51 -0700 | [diff] [blame] | 39 | .flags = HCD_USB2 | HCD_MEMORY | HCD_BH, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * basic lifecycle operations |
| 43 | */ |
| 44 | .reset = ehci_sh_reset, |
| 45 | .start = ehci_run, |
| 46 | .stop = ehci_stop, |
| 47 | .shutdown = ehci_shutdown, |
| 48 | |
| 49 | /* |
| 50 | * managing i/o requests and associated device resources |
| 51 | */ |
| 52 | .urb_enqueue = ehci_urb_enqueue, |
| 53 | .urb_dequeue = ehci_urb_dequeue, |
| 54 | .endpoint_disable = ehci_endpoint_disable, |
Paul Mundt | 6e9d447 | 2010-11-26 16:48:31 +0900 | [diff] [blame] | 55 | .endpoint_reset = ehci_endpoint_reset, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 56 | |
| 57 | /* |
| 58 | * scheduling support |
| 59 | */ |
| 60 | .get_frame_number = ehci_get_frame, |
| 61 | |
| 62 | /* |
| 63 | * root hub support |
| 64 | */ |
| 65 | .hub_status_data = ehci_hub_status_data, |
| 66 | .hub_control = ehci_hub_control, |
| 67 | |
| 68 | #ifdef CONFIG_PM |
| 69 | .bus_suspend = ehci_bus_suspend, |
| 70 | .bus_resume = ehci_bus_resume, |
| 71 | #endif |
| 72 | |
| 73 | .relinquish_port = ehci_relinquish_port, |
| 74 | .port_handed_over = ehci_port_handed_over, |
Paul Mundt | 6e9d447 | 2010-11-26 16:48:31 +0900 | [diff] [blame] | 75 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 76 | }; |
| 77 | |
| 78 | static int ehci_hcd_sh_probe(struct platform_device *pdev) |
| 79 | { |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 80 | struct resource *res; |
| 81 | struct ehci_sh_priv *priv; |
Nobuhiro Iwamatsu | 3e0c70d | 2012-04-12 15:48:49 +0900 | [diff] [blame] | 82 | struct ehci_sh_platdata *pdata; |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 83 | struct usb_hcd *hcd; |
| 84 | int irq, ret; |
| 85 | |
| 86 | if (usb_disabled()) |
| 87 | return -ENODEV; |
| 88 | |
| 89 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 90 | if (!res) { |
| 91 | dev_err(&pdev->dev, |
| 92 | "Found HC with no register addr. Check %s setup!\n", |
| 93 | dev_name(&pdev->dev)); |
| 94 | ret = -ENODEV; |
| 95 | goto fail_create_hcd; |
| 96 | } |
| 97 | |
| 98 | irq = platform_get_irq(pdev, 0); |
| 99 | if (irq <= 0) { |
| 100 | dev_err(&pdev->dev, |
| 101 | "Found HC with no IRQ. Check %s setup!\n", |
| 102 | dev_name(&pdev->dev)); |
| 103 | ret = -ENODEV; |
| 104 | goto fail_create_hcd; |
| 105 | } |
| 106 | |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 107 | pdata = dev_get_platdata(&pdev->dev); |
Nobuhiro Iwamatsu | 3e0c70d | 2012-04-12 15:48:49 +0900 | [diff] [blame] | 108 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 109 | /* initialize hcd */ |
| 110 | hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev, |
| 111 | dev_name(&pdev->dev)); |
| 112 | if (!hcd) { |
| 113 | ret = -ENOMEM; |
| 114 | goto fail_create_hcd; |
| 115 | } |
| 116 | |
| 117 | hcd->rsrc_start = res->start; |
| 118 | hcd->rsrc_len = resource_size(res); |
| 119 | |
Thierry Reding | 148e113 | 2013-01-21 11:09:22 +0100 | [diff] [blame] | 120 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
| 121 | if (IS_ERR(hcd->regs)) { |
| 122 | ret = PTR_ERR(hcd->regs); |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 123 | goto fail_request_resource; |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 124 | } |
| 125 | |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 126 | priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), |
| 127 | GFP_KERNEL); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 128 | if (!priv) { |
| 129 | dev_dbg(&pdev->dev, "error allocating priv data\n"); |
| 130 | ret = -ENOMEM; |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 131 | goto fail_request_resource; |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | /* These are optional, we don't care if they fail */ |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 135 | priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 136 | if (IS_ERR(priv->fclk)) |
| 137 | priv->fclk = NULL; |
| 138 | |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 139 | priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 140 | if (IS_ERR(priv->iclk)) |
| 141 | priv->iclk = NULL; |
| 142 | |
| 143 | clk_enable(priv->fclk); |
| 144 | clk_enable(priv->iclk); |
| 145 | |
Nobuhiro Iwamatsu | 3e0c70d | 2012-04-12 15:48:49 +0900 | [diff] [blame] | 146 | if (pdata && pdata->phy_init) |
| 147 | pdata->phy_init(); |
| 148 | |
Yong Zhang | b5dd18d | 2011-09-07 16:10:52 +0800 | [diff] [blame] | 149 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 150 | if (ret != 0) { |
| 151 | dev_err(&pdev->dev, "Failed to add hcd"); |
| 152 | goto fail_add_hcd; |
| 153 | } |
Peter Chen | 3c9740a | 2013-11-05 10:46:02 +0800 | [diff] [blame] | 154 | device_wakeup_enable(hcd->self.controller); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 155 | |
| 156 | priv->hcd = hcd; |
| 157 | platform_set_drvdata(pdev, priv); |
| 158 | |
| 159 | return ret; |
| 160 | |
| 161 | fail_add_hcd: |
| 162 | clk_disable(priv->iclk); |
| 163 | clk_disable(priv->fclk); |
| 164 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 165 | fail_request_resource: |
| 166 | usb_put_hcd(hcd); |
| 167 | fail_create_hcd: |
| 168 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); |
| 169 | |
| 170 | return ret; |
| 171 | } |
| 172 | |
Dmitry Torokhov | 39d3568 | 2013-02-24 00:55:07 -0800 | [diff] [blame] | 173 | static int ehci_hcd_sh_remove(struct platform_device *pdev) |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 174 | { |
| 175 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); |
| 176 | struct usb_hcd *hcd = priv->hcd; |
| 177 | |
| 178 | usb_remove_hcd(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 179 | usb_put_hcd(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 180 | |
| 181 | clk_disable(priv->fclk); |
| 182 | clk_disable(priv->iclk); |
| 183 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 184 | return 0; |
| 185 | } |
| 186 | |
Paul Mundt | c1e0774 | 2010-11-26 16:43:38 +0900 | [diff] [blame] | 187 | static void ehci_hcd_sh_shutdown(struct platform_device *pdev) |
| 188 | { |
| 189 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); |
| 190 | struct usb_hcd *hcd = priv->hcd; |
| 191 | |
| 192 | if (hcd->driver->shutdown) |
| 193 | hcd->driver->shutdown(hcd); |
| 194 | } |
| 195 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 196 | static struct platform_driver ehci_hcd_sh_driver = { |
| 197 | .probe = ehci_hcd_sh_probe, |
Nobuhiro Iwamatsu | 1c3a46d | 2013-03-27 15:09:03 +0900 | [diff] [blame] | 198 | .remove = ehci_hcd_sh_remove, |
Paul Mundt | c1e0774 | 2010-11-26 16:43:38 +0900 | [diff] [blame] | 199 | .shutdown = ehci_hcd_sh_shutdown, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 200 | .driver = { |
| 201 | .name = "sh_ehci", |
| 202 | .owner = THIS_MODULE, |
| 203 | }, |
| 204 | }; |
| 205 | |
| 206 | MODULE_ALIAS("platform:sh_ehci"); |